What I think irritates people, other than the guy being practically a physical parody of the smug Vox class, is that he's a total flip-flopper. He clearly doesn't believe in hard left progressivism, but he always perfectly toes the 'centrist Democrat in power' line, stabbing either the woke or the right as suits.
I agree though the rage is unmerited and unhinged. Attack the guy's ideas, not the guy.